Finding the Fourth Proportional to 1,439.27, 1,985.94 and 849.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.27 : 1,985.94 = 849.99 : x
2. Step 2: Convert to fraction form
   1,439.27/1,985.94 = 849.99/x
3. Step 3: Cross multiply
   1,439.27x = 1,985.94 × 849.99
4. Step 4: Simplify right side
   1,439.27x = 1,688,029.14
5. Step 5: Solve for x
   x = 1,688,029.14/1,439.27
6. Step 6: Final answer
   x = 1,172.84